A collection of components designed to facilitate the replacement of a General Motors truck’s (GMT400 platform) original engine with a more modern LS-series engine. These kits typically include items such as engine mounts, transmission adapters, wiring harnesses, and other necessary hardware to ensure compatibility between the newer engine and the older vehicle chassis and systems. As an example, a common application involves replacing a worn-out 350 cubic inch small-block engine in a 1990s Chevrolet C1500 with a more powerful and fuel-efficient LS1 engine.
The appeal lies in the ability to significantly enhance the performance and reliability of these classic trucks. The LS engine family offers improved horsepower, torque, and fuel economy compared to the engines originally offered in GMT400 vehicles. Furthermore, these engines are relatively easy to source and are supported by a large aftermarket, making upgrades and maintenance straightforward. The practice has gained popularity due to the increased availability of both the engine and the required conversion components. This results in a cost-effective method for modernizing a well-maintained and aesthetically pleasing truck.
